Ribbed collection tube



FIG. 1 is a perspective view of the ribbed collection tube;

FIG. 2 is a side elevational view;

FIG. 3 is a bottom plan view of the collection tube of FIG. 2; and,

FIG. 4 is a top plan view of the collection tube of FIG. 2.

The undisclosed sides of FIG. 2 are identical to that shown. 

The ornamental design for a ribbed collection tube, as shown and described. 